[PATCH 1/3] fields: Move all custom fields to specific file

[Stephen Finucane]

Keep things modular.

Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>
---
 patchwork/fields.py | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 patchwork/models.py | 42 +----------------------------------
 2 files changed, 65 insertions(+), 41 deletions(-)
 create mode 100644 patchwork/fields.py

diff --git a/patchwork/fields.py b/patchwork/fields.py
new file mode 100644
index 0000000..96fdd28
--- /dev/null
+++ b/patchwork/fields.py
@@ -0,0 +1,64 @@
+# Patchwork - automated patch tracking system
+# Copyright (C) 2008 Jeremy Kerr <jk at ozlabs.org>
+# Copyright (C) 2015 Intel Corporation
+#
+# This file is part of the Patchwork package.
+#
+# Patchwork is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# Patchwork is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Patchwork; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+from __future__ import absolute_import
+
+import django
+from django.db import models
+from django.utils import six
+
+
+if django.VERSION < (1, 8):
+    HashFieldBase = six.with_metaclass(models.SubfieldBase, models.CharField)
+else:
+    HashFieldBase = models.CharField
+
+
+class HashField(HashFieldBase):
+
+    def __init__(self, algorithm='sha1', *args, **kwargs):
+        self.algorithm = algorithm
+        try:
+            import hashlib
+
+            def _construct(string=''):
+                if isinstance(string, six.text_type):
+                    string = string.encode('utf-8')
+                return hashlib.new(self.algorithm, string)
+            self.construct = _construct
+            self.n_bytes = len(hashlib.new(self.algorithm).hexdigest())
+        except ImportError:
+            modules = {'sha1': 'sha', 'md5': 'md5'}
+
+            if algorithm not in modules:
+                raise NameError("Unknown algorithm '%s'" % algorithm)
+
+            self.construct = __import__(modules[algorithm]).new
+
+        self.n_bytes = len(self.construct().hexdigest())
+
+        kwargs['max_length'] = self.n_bytes
+        super(HashField, self).__init__(*args, **kwargs)
+
+    def from_db_value(self, value, expression, connection, context):
+        return self.to_python(value)
+
+    def db_type(self, connection=None):
+        return 'char(%d)' % self.n_bytes
diff --git a/patchwork/models.py b/patchwork/models.py
index 5686ec8..252f041 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -25,7 +25,6 @@ import datetime
 import random
 import re
 
-import django
 from django.contrib.auth.models import User
 from django.conf import settings
 from django.contrib.sites.models import Site
@@ -34,9 +33,9 @@ from django.db import models
 from django.db.models import Q
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.functional import cached_property
-from django.utils import six
 from django.utils.six.moves import filter
 
+from patchwork.fields import HashField
 from patchwork.parser import extract_tags, hash_patch
 
 
@@ -178,45 +177,6 @@ class State(models.Model):
         ordering = ['ordering']
 
 
-if django.VERSION < (1, 8):
-    HashFieldBase = six.with_metaclass(models.SubfieldBase, models.CharField)
-else:
-    HashFieldBase = models.CharField
-
-
-class HashField(HashFieldBase):
-
-    def __init__(self, algorithm='sha1', *args, **kwargs):
-        self.algorithm = algorithm
-        try:
-            import hashlib
-
-            def _construct(string=''):
-                if isinstance(string, six.text_type):
-                    string = string.encode('utf-8')
-                return hashlib.new(self.algorithm, string)
-            self.construct = _construct
-            self.n_bytes = len(hashlib.new(self.algorithm).hexdigest())
-        except ImportError:
-            modules = {'sha1': 'sha', 'md5': 'md5'}
-
-            if algorithm not in modules:
-                raise NameError("Unknown algorithm '%s'" % algorithm)
-
-            self.construct = __import__(modules[algorithm]).new
-
-        self.n_bytes = len(self.construct().hexdigest())
-
-        kwargs['max_length'] = self.n_bytes
-        super(HashField, self).__init__(*args, **kwargs)
-
-    def from_db_value(self, value, expression, connection, context):
-        return self.to_python(value)
-
-    def db_type(self, connection=None):
-        return 'char(%d)' % self.n_bytes
-
-
 @python_2_unicode_compatible
 class Tag(models.Model):
     name = models.CharField(max_length=20)
-- 
2.0.0